Log Message:
parallel: update to 20210722

New in this release:

* --results no longer prints the result to standard output (stdout) as voted in \ 
https://lists.gnu.org/archive/html/parallel/2020-12/msg00003.html
* parset supports associative arrays in bash, ksh, zsh.
* Online HTML is now generated by Sphinx.
* Bug fixes and man page updates.